Stop motion



Jan. 23, 1945. B. c. Glass Erm.

STOP MOTION Filed Jan. 7, 1944 INVENTORS` B.C.G\BBS.

BY R.H. ROUGHSEDGE. #M/1m.

ATTORN EVS Patented Jan. 23, 1945 STOP MOTION Bradford C. Gibbs,Teaneck, and Robert H.

Roughsedge, Ramsey, N. J.,

assignors to Celanese Corporation of America, a corporation of DelawareApplication January 7, 1944, Serial No. 517,330

Claims. k(Cl. 242-37) This invention relates to stop motions fortwisting and winding machines, and relates more particularly to stopmotions for twister-cheesers adapted to produce large yarn cheeses.

An important object of this invention is the provision of a novel stopmotion device for twistercheesers for raising the take-up package fromits friction drive upon failure of the yarn, so as to stop the rotationof the yarn packages.

Another object of this invention is to provide an improved stop motiondevice, including an air cylinder having a solenoid operated valve, forstopping the rotation of the take-up package in twister-cheesers uponfailure of the yarn.

Other objects, together with certain details of construction andcombinations of parts, will appear from the following detaileddescription.

In the drawing, wherein like reference numerals indicate like partsthroughout both views thereof,

Fig. l is a side elevational view, substantially in cross-section, ofone modification of our novel stop motion device showing its relation tothe take-up package lever arm of a twister-cheeser, which lever arm itis adapted to raise upon failure of the yarn, and

Fig. 2 is a side elevational view, partly in section, of a modifiedarrangement of air cylinder and solenoid operated valve therefor.

Our invention comprises a novel stop motion device, including an aircylinder and solenoid operated valve therefor, which is eminentlysuitable for use in raising the yarn package 'from its friction drive intwister-cheesers producing larger yarn cheeses, i. e. cheeses on theorder of two, three or more pounds. Twister-cheesers producing suchlarge cheeses are provided with heavier lever arms for holding the yarnpackage as well as a heavier friction drive, etc., the weight of thecheeses and lever arms necessitating the use of a heavier counterweightand other elements making up the stop motion device. In accordance withour invention, there is provided a stop motion device, responsive toyarn failure, which obviates the use of heavy -counterweights resultingin freedom of vibration, which is faster in action, land which is easyto rethread and reset. These advantages are attained by the use of anair cylinder, having a solenoid operated valve, for operating the meansfor raising the yarn package out of contact with its friction drive, andmeans for quickly setting in operation the solenoid operating the valveupon failure of the yarn.

Referring now to the drawing for a more detailed description of ourinvention, the reference numeral I indicates the frame of a twister- 55cheeser, a portion of whi-ch is shown in dot-dash lines to show therelationship of our stop-motion device thereto. In frame I is journaleda shaft 2 having attached thereto a lever arm 3 the outer or free end ofwhich is provided with a split bearing 4. A spindle 5 is held in thesplit bearing 4 by means of la bolt 6. The spindle 5 is adapted toreceive the cardboard cone upon which a cheese l is built up from yarn 8drawn from a suitable source of supply which may be another yarn packageor even an artificial yarn spinning machine. rIhe yarn package may reston and Ibe driven lby rolls (not shown), as is Well understood in theart. However, the spindle 5 may be provided :with discs 9 which may bedriven by frictional contact with suitable rolls.

To stop the rotation of the yarn package l, i. e. thewinding of the yarninto a cheese, the lever arm 3 is raised, thus lifting the package fromthe friction drive means. The stop motion device of our inventionlcomprises a simple, efcient and quick-acting means for lifting the yarnpackage from its drive, and will now be described more particularly. Theyarn 8 in its travel from the source of supply to the cheese 'I passesthrough a guide II which may be supported in any suitable manner as bybeing mounted on a cross-piece I2 of the twister-cheeser frame I. Theyarn then passes over a Ibar I3 carried on the free end of a pivoted armI4, over guide rod I5 and on to the cheese l. The arm I4 may be integralwhen screwed into a casting |16 which is pivoted yon a shaft I6 whichshaft is carried by a bracket I7 fastened in any suitable manner to across-bar I8 on the twister-cheeser frame. The casting I6 is providedwith an integral extension I9 which carries at its outer end aoounterweight 20. 'I'he traveling yarn 8 holds the arm I4 in theposition shown in Fig. 1. However, any failure in the yarn, such asbreakage thereof or slack tension, permits the arm I4 to rotateclockwise.

The rotation of the arm I4, together with the extension I9 of 'castingI6, causes the weight 20 to operate the switch generally indicated byreference numeral 2I, contained in a dustand moisture-proof housing 22,by the weight 20 striking a plunger 23, ywhich is also one terminal ofthe switch. The plunger 23 operates against the action of spring 24. Theplunger 23 is connected to a source of electric power by a lead line 25while the contact 25' is attached to a lead line 26 connected to oneterminal of a solenoid 27. The other terminal of the solenoid Z'I isconnected by a lead line 28 to the source of electric power. Thesolenoid may be of the conventional type comprising a hollow core 29supporting the windings or coil 3|, all enclosed in a suitable housingattached to a casting 32 by means of tap bolts 33. The casting 32 formsa cylinder 34 open at one end A35 and shaped to a shouldered valve stemguide 36 at the other end. The cylinder 34 contains a spool type slidingvalve 31 having suitable gaskets 3B and a valve stem 39. The valve stem'39 extends through the guide 36 and is forced in an extended positionby means of an expansirble spiing 4l that ts on the shouldered guide 36and abuts against a stop 42 that is adjustably positioned on the stem 39by means of a nut 43. The y cylinder 34 is provided -with an inlet port44 connected to a source of fluid pressure by a pipe 45 and an outletport 46 that communicates with a working cylinder 41. The -cylinder 34also containsV a bleeder opening or port 48 opening the cylinder 34 tothe atmosphere so that any fluid pressure leaking past the valve 31 willpass to the atmosphere without affecting the pressure in the workingcylinder 41. In ther end of the valve 31 opposite the stem 39V is tappedan iron valve stem 48.

The working cylinder 41 formed of a suitable housing, preferably but notnecessarily cast integral with the valve casting 32, contains a piston49 with suitable gasket 5l and a bolt 52 adapted to hold the sametogether and to a piston rod 53. A head plate 54 is attached to thecylinder walls 41 by tap bolts 55. The outer end of the piston rod 53 isformed into a shoe'56 that is adapted to push against and raise thelever arm 3.

In operation, the mechanism is normally in the position shown in thedrawing with. any air or other fluid used to. operate the piston leakingpast the valve 31 'passing to the atmosphere through port 48. Uponfailure of the yarn, however, the lever i9. swings clockwise forcing theweightl 20 against the plunger 23 thus energizing the solenoid 21. Theenergized solenoid pulls the valve stem 48.' and thereby the valve 31t-o the right, as shown in the drawing, thus connecting the supply port44 with the working cylinder 41- through the port 46. The pressure inthe cylinder 4-1v moves the piston rod 53 upward to effect a movement ofthe lever arm 3 andyarn package 1i to inoperative position. Themechanism remains in this position until the yarn controlledarm I4 ismoved back and held in place by a yarn and then the deenergized solenoidallows the spring' 4I to move the valve 31 to the left, thus" openingthe cylinder 41 to the atmosphere through ports 46 andl 4B, whereuponthe weight of the arm 3 forces piston rod 53 back tothe position shown,I

The modifications shown in Figs; l and-2 do not differ from each otherin function but only in the relative position of cylinder and valve, thedifference being merely one of overall design adapting the mechanism todifferent winding machines. In Fig. 1, the valve 31 is at a right angleto the working .cylinder 4'1, while in Fig. 2 the valve 31 is parallelto the working cylinder 41'.

The casting forming the walls of the valve cylinder and working cylindermay be of any suitable material such as iron, brass, lead alloys,plastics, etc. These castings may be provided with projecting ears forattaching them to the frame of the twister-cheeser;

It is to be understood that the foregoing detailed description is givenmerely by Way of illustration and that many variations may be madetherein without departing from` the spirit of our invention. f

Having described our invention, what we" desire to secure by LettersPatent is:

1. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a frictionally driven yarn package, comprising anelectric circuit normally maintained in open position by a yarn andclosed by failure of the yarn, a solenoid in said circuit, a valveoperated by said solenoid, a working cylinder connected to said valve, apiston in said cylinder and a rod connected to and movable with saidpiston for moving said lever arm about its pivot'l to disengage saidyarn package from its friction drive.

2. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a frictionally driven yarn package, comprising anelectric circuit normally maintained in open position by a yarn andclosed by failure of the yarn, a solenoid in said circuit, a valveoperated by said solenoid, a working cylinder connected to said valve, apiston in said cylinder and a rod connected to and movable with saidpiston for mov` ing said lever arm about its pivot to disengage saidyarn package from its friction drive, said valve being provided with adrain port for permitting said piston to be lowered upon deenergizationof said solenoid.

3. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a frictionally driven yarn package, comprising avalve, a working cylinder connected to said valve, a piston in saidcylinder, a rod connected to and movable with said piston for movingsaid lever arm about its pivot to disengage said yarn package from itsfriction drive, an electric circuit normally maintained in open positionby a yarn and closed by failure of the yarn, a solenoid in said circuit,said solenoid, upon being energized on failure of the yarn, causing saidvalve to be moved into position to permit the operation of said piston,and means for returning said valve to its original position upondeenergization of said solenoid.

4. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a frictionally driven yarn package, comprising avalve, a working cylinder connected to said valve, a piston in saidcylinder, a rod connected to and movable with said 'piston for movingsaid lever arm about its pivot to disengage said yarn Dackage from itsfriction drive, an electric circuit normally maintained in open positionby a yarn and closed by failure of the yarn, a solenoid in said circuit,said solenoid, upon being energized on failure of the yarn, causing saidvalve to be moved into position to permit the operation of said piston,and a spring forv returning said valve to its original position upondeenergization of' said solenoid.

5. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a` frictionally driven yarn package, comprising avalve, a working cylinder connected to said valve, a piston in saidcylinder, a rod connected to and movable with said piston for movingsaid lever y circuit, said solenoid, upon being energized onfailure ofthe yarn, causing said valve to be moved into position to permit theoperation of said piston, and means for returning said valve to its`original position upon deenergization of said solenoid, said valve beingprovided with a drain port for permitting the piston to be lowered uponthe return of said valve t0 its original position.

6. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a frictionally driven yarn package, comprising avalve, a working cylinder connected to said valve, a piston in saidcylinder, a rod connected to and movable with said piston for movingsaid lever arm about its pivot to disengage said yarn Vpackage from itsfriction drive, an electric circuit normally maintained in open positionby a yarn and closed by failure of the yarn, a solenoid in said circuit,said solenoid, upon being energized on failure of the yarn, causing saidvalve to be moved into position to permit the operation of said piston,and a spring for returning said valve to its original position upondeenergization of said solenoid, said Valve being provided with a drainport for permitting the piston to be lowered upon the return of saidvalve to its original pod sition.

7. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a frictionally driven yarn package, comprising avalve, a working cylinder connected to said valve,

a piston in said cylinder, a rod connected to and movable with saidpiston for moving said lever arm about its pivot to disengage said yarnpackage from its friction drive, an electric circuit normally maintainedin open position by a yarn and position to permit the operation of saidpiston,

and means for returning said valve to its original position upondeenergization of said solenoid.

8. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a frictionally driven yarn package, comprising avalve, a working cylinder connected to said valve, a piston in saidcylinder, a rod connected to and movable with said piston for movingsaid lever arm about its pivot to disengage said yarn package from itsfriction drive, an electric circuit nor'- mally maintained in openposition by a yarn and closed by failure of the yarn, a solenoid and aswitch therefor in said circuit, said switch being operated to closesaid circuit by said lever arm on failure of the yarn, therebyenergizing said solenoid to cause movement of said valve into positionto permit the operation of said piston, and a spring for returning saidvalve to its original position upon deenergization of said solenoid.

9. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a frictionally driven yarn package, comprising avalve, a working cylinder connected to said valve, a piston in saidcylinder, a rod connected to and movable with said piston for movingsaid lever arm about its pivot to disengage said yarn package from itsfriction drive, an electric circuit normally maintained in open positionby a yarn and closed by failure of the yarn, a solenoid and a switchtherefor in said circuit, said switch being operated to close saidcircuit by said lever arm on failure of the yarn, thereby energizingsaid solenoid to cause movement of said valve into position to permitthe operation of said piston, and means for returning said valve to itsoriginal position upon deenergization of said solenoid, said valve beingprovided with a drain port for permitting the piston to be lowered uponthe return of said valve to its original position.

10. A stop motion for a twisting and winding machine having a pivotedlever arm supporting a frictionally driven yarn package, comprising avalve, a working cylinder connected to said valve, a piston in saidcylinder, a rod connected to and movable with said piston for movingsaid lever arm about its pivot to disengage said yarn package from itsfriction drive, an electric circuit; normally maintained in openposition by a yarn and closed by failure of the yarn, a solenoid and aswitch therefor in said circuit, said switch being operated to closesaid circuit by said lever arm on failure of the yarn, therebyenergizing said solenoid to cause movement of said valve into positionto permit the operation of said piston, and'

